package com.example.deadqueue.config;

import org.springframework.amqp.core.*;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.HashMap;
import java.util.Map;

/**
 * @author Tonysong
 * @version 1.0
 * 延迟队列演示配置类
 */
//@Configuration
public class TtlQueueConfig {
    //普通交换机
    public static final String X_EXCHANGE = "X";
    //死信交换机
    public static final String Y_DEAD_LETTER_EXCHANGE = "Y";
    //普通队列
    public static final String QUEUE_A = "QA";
    public static final String QUEUE_B = "QB";
    //死信队列
    public static final String DEAD_LETTER_QUEUE = "QD";

    //声明我们的两个交换机
    @Bean("xExchange")
    public DirectExchange xExchange() {
        return new DirectExchange(X_EXCHANGE);
    }

    @Bean("yExchange")
    public DirectExchange yExchange() {
        return new DirectExchange(Y_DEAD_LETTER_EXCHANGE);
    }

    //声明我们的两个普通队列
    @Bean("queueA")
    public Queue queueA() {
        Map<String, Object> arguments = new HashMap<>(3);//3代表初始map的长度
        //设置死信交换机
        arguments.put("x-dead-letter-exchange", Y_DEAD_LETTER_EXCHANGE);
        //设置routingKey
        arguments.put("x-dead-letter-routing-key", "YD");
        //设置过期时间
        arguments.put("x-message-ttl", 10000);

        return QueueBuilder.durable(QUEUE_A).withArguments(arguments).build();
    }

    @Bean("queueB")
    public Queue queueB() {
        Map<String, Object> arguments = new HashMap<>(3);//3代表初始map的长度
        //设置死信交换机
        arguments.put("x-dead-letter-exchange", Y_DEAD_LETTER_EXCHANGE);
        //设置routingKey
        arguments.put("x-dead-letter-routing-key", "YD");
        //设置过期时间
        arguments.put("x-message-ttl", 40000);

        return QueueBuilder.durable(QUEUE_B).withArguments(arguments).build();
    }

    //声明我们的死信队列
    @Bean("queueD")
    public Queue queueD() {
//        return new Queue(DEAD_LETTER_QUEUE); //两种创建队列的方式均可
        return QueueBuilder.durable(DEAD_LETTER_QUEUE).build();
    }

    //将我们的两个普通队列绑定到普通交换机X上
    @Bean
    public Binding queueABindingX(@Qualifier("queueA") Queue queueA,
                                  @Qualifier("xExchange") DirectExchange xExchange) {
        return BindingBuilder.bind(queueA).to(xExchange).with("XA");
    }

    @Bean
    public Binding queueBBindingX(@Qualifier("queueB") Queue queueB,
                                  @Qualifier("xExchange") DirectExchange xExchange) {
        return BindingBuilder.bind(queueB).to(xExchange).with("XB");
    }

    //将我们的死信队列绑定到死信交换机上
    @Bean
    public Binding queueDBindingY(@Qualifier("queueD") Queue queueD,
                                  @Qualifier("yExchange") DirectExchange yExchange) {
        return BindingBuilder.bind(queueD).to(yExchange).with("YD");
    }

    //优化我们的延迟队列，再设置一个普通队列，不为其设置过期时间，让它做公共队列
    public static final String QUEUE_C = "QC";
    //声明这个队列
    @Bean
    public Queue queueC(){
        Map<String, Object> arguments = new HashMap<>(3);
        //设置死信交换机
        arguments.put("x-dead-letter-exchange", Y_DEAD_LETTER_EXCHANGE);
        //设置routingKey
        arguments.put("x-dead-letter-routing-key", "YD");
        return QueueBuilder.durable(QUEUE_C).withArguments(arguments).build();
    }
    //绑定到我们的交换机X
    @Bean
    public Binding queueCBindingX(@Qualifier("queueC") Queue queueC,
                                  @Qualifier("xExchange") DirectExchange xExchange){
        return BindingBuilder.bind(queueC).to(xExchange).with("XC");
    }

}